Uploaded March 2026 | Updated September 2026, 2 weeks ago
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Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: bit.ly/3qPrDhM
RoadTest and Reviews: bit.ly/3pV5Bux
Project14: bit.ly/31wbnJY





![Building a DEFCON-style sign with an ESP32
In this episode of element14 Presents, Mark builds a DEFCON-style status display using an ESP32 and addressable LEDs. Originally intended to track global alert levels, the project was reimagined as a personal progress indicator that changes color based on task completion. The ESP32 hosts a web-based interface where users can manage tasks, with the LED sign reflecting their status in real time. This project combines simple electronics, custom laser-cut acrylic housing, and Wi-Fi control for a practical and adaptable build. Full details and code are available on the element14 Community: https://bit.ly/453H4XA
[00:51] Components needed
[01:16] Assembling the mechanics
[04:30] Spray painting
[05:34] Part 2
[08:23] Electronics intro
[08:55] Wiring
[20:08] Programming
[21:50] Connecting to the network
[23:08] Demo
#ESP32 #LEDDisplay- #IoTProject
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14: https://bit.ly/31wbnJY Building a DEFCON-style sign with an ESP32](https://i.ytimg.com/vi/xVM-HY_BveM/mqdefault.jpg)

![PlatypusBot Upgrade! PID Controllers & ROS on Raspberry Pi for Beginners!
In this episode, Milos upgrades his open-source PlatypusBot into Perry the PlatypusBot, transforming a simple Arduino-based rover into a full ROS2-powered robotics platform. He explains how the motor encoders work, implements PID control for precise movement, and connects an Arduino Uno R4 WiFi to a Raspberry Pi 4B running ROS2 Humble for real-time command and control. With a 3D-printed fedora and a name inspired by community feedback, Perry now moves, turns, and responds to ROS commands, laying the groundwork for future additions like sensors, LIDAR, and SLAM: https://bit.ly/4hXD40Z
#ArduinoRobotics #RaspberryPiProjects #DIYRobotBuild
[01:24]-Inspecting the Motor
[06:52]-Electronics
[08:45]-PID Controllers
[12:48]-Arduino IDE
[18:01]-Robot Operating System-ROS
[23:49]-Programming in ROS2
[31:52]-Meet Perry the PlatyousBot!
[32:37]-Testing
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14: https://bit.ly/31wbnJY PlatypusBot Upgrade! PID Controllers & ROS on Raspberry Pi for Beginners!](https://i.ytimg.com/vi/xvtZfC_HY2U/mqdefault.jpg)

![Reflex Training Machine Build - Using Relays, Transistors & Arduino
In this video, Mark builds a reaction-based catch game inspired by a classic TV challenge, using an Arduino Nano, relay-driven actuators, and a simple but effective control system. The setup drops sticks at random intervals, testing reflexes while showcasing practical electronics design, from power regulation and PCB assembly to embedded programming and mechanical integration. This project balances accessibility with clever implementation, making it ideal for makers looking to build something interactive and fun, you can find the supporting code on the element14 community: https://bit.ly/4dBqWRE
#arduinoprojects #diyelectronics #stemprojects
[00:00]-Intro
[02:20]-Components
[03:43]-Populating The Board
[08:24]-The Base
[10:26]-Mark gets Framed
[15:09]-The Demo
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14: https://bit.ly/31wbnJY Reflex Training Machine Build - Using Relays, Transistors & Arduino](https://i.ytimg.com/vi/yxGkHVo9bEw/mqdefault.jpg)
![DIY RF Modulator + Raspberry Pi Pico = Retro Gaming!
Andy takes a 1987 Sony Watchman portable CRT TV and transforms it into a working retro arcade system—without modifying the TV itself. Using a Raspberry Pi Pico, custom NTSC video generation, a hand-built RF modulator, and an Atari joystick, he codes an original Space Invaders–style game that broadcasts wirelessly to the Watchman. Along the way, he tackles composite video generation from scratch, resistor ladder DAC design, precise timing with PIO and DMA, and building RF circuitry from a 1985 magazine schematic. See the build blog here: https://bit.ly/4phJUBL
[00:34] Project Overview
[02:34] Generating Composite Video
[10:47] DIY RF Modulator
[15:10] Programming a Retro Game
[16:43] The Reveal
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14: https://bit.ly/31wbnJY DIY RF Modulator + Raspberry Pi Pico = Retro Gaming!](https://i.ytimg.com/vi/z0shhEdNLIE/mqdefault.jpg)